奥迪A6L搭载的2.0T发动机与CT6搭载的2.0T发动机相比，功率低了38KW，扭矩低了50NM（）

A. OUT OF

B. RURAL

C. TO PROTECT A. WORKING【T1】______ THEIR URBAN FOREST

B. TREES TAKE POLLUTION【T2】______ THE AIR

C. BUT YOU ARE NOT IN【T3】______ AREA YOU ARE STANDING IN A BEAUTIFUL FOREST IN JAPA

N. THE AIR IS CLEAN AND SMELLS LIKE PLANTS AND FLOWERS. THERE ARE 175 DIFFERENT KINDS OF TREES, AND 60 KINDS OF BIRDS LIVE HER

E.【T4】______ YOU ARE DOWNTOWN IN THE CITY OF NARA, JAPAN, IN KASUGAYAMA FOREST, THE OLDEST URBAN FOREST IN THE WORL

D. CITIES AROUND THE WORLD ARE【T5】______ SOME URBAN FORESTS ARE PARKS, AND SOME ARE JUST STREETS WITH A LOT OF TREES. BUT ALL URBAN FORESTS HAVE MANY GOOD EFFECTS ON THE ENVIRONMENT.【T6】______ THEY ALSO STOP THE NOISE FROM HEAVY TRAFFI

C.

A.T1WI呈高信号，T1WI呈高信号，CT为低密度

B.T1WI呈高信号，T2WI呈低信号，CT为高密度

C.T1WI呈高信号，T2WI呈低信号，CT为低密度

D.T1WI呈低信号，T2WI呈低信号，CT为高密度

E.T1WI呈低信号，T2WI呈高信号，CT为低密度

A.小型打印机

B.干式激光打印机

C.CTct图像拷贝机

D.CT多辐照相机

E.以上都不是

A. OUT OF

B. RURAL

C. TO PROTECT A. WORKING【T1】______ THEIR URBAN FOREST

B. TREES TAKE POLLUTION【T2】______ THE AIR

C. BUT YOU ARE NOT IN【T3】______ AREA YOU ARE STANDING IN A BEAUTIFUL FOREST IN JAPA

N. THE AIR IS CLEAN AND SMELLS LIKE PLANTS AND FLOWERS. THERE ARE 175 DIFFERENT KINDS OF TREES, AND 60 KINDS OF BIRDS LIVE HER

E.【T4】______ YOU ARE DOWNTOWN IN THE CITY OF NARA, JAPAN, IN KASUGAYAMA FOREST, THE OLDEST URBAN FOREST IN THE WORL

D. CITIES AROUND THE WORLD ARE【T5】______ SOME URBAN FORESTS ARE PARKS, AND SOME ARE JUST STREETS WITH A LOT OF TREES. BUT ALL URBAN FORESTS HAVE MANY GOOD EFFECTS ON THE ENVIRONMENT.【T6】______ THEY ALSO STOP THE NOISE FROM HEAVY TRAFFI

C.

A. OUT OF

B. RURAL

C. TO PROTECT A. WORKING【T1】______ THEIR URBAN FOREST

B. TREES TAKE POLLUTION【T2】______ THE AIR

C. BUT YOU ARE NOT IN【T3】______ AREA YOU ARE STANDING IN A BEAUTIFUL FOREST IN JAPA

N. THE AIR IS CLEAN AND SMELLS LIKE PLANTS AND FLOWERS. THERE ARE 175 DIFFERENT KINDS OF TREES, AND 60 KINDS OF BIRDS LIVE HER

E.【T4】______ YOU ARE DOWNTOWN IN THE CITY OF NARA, JAPAN, IN KASUGAYAMA FOREST, THE OLDEST URBAN FOREST IN THE WORL

D. CITIES AROUND THE WORLD ARE【T5】______ SOME URBAN FORESTS ARE PARKS, AND SOME ARE JUST STREETS WITH A LOT OF TREES. BUT ALL URBAN FORESTS HAVE MANY GOOD EFFECTS ON THE ENVIRONMENT.【T6】______ THEY ALSO STOP THE NOISE FROM HEAVY TRAFFI

C.

A. OUT OF

B. RURAL

C. TO PROTECT A. WORKING【T1】______ THEIR URBAN FOREST

B. TREES TAKE POLLUTION【T2】______ THE AIR

C. BUT YOU ARE NOT IN【T3】______ AREA YOU ARE STANDING IN A BEAUTIFUL FOREST IN JAPA

N. THE AIR IS CLEAN AND SMELLS LIKE PLANTS AND FLOWERS. THERE ARE 175 DIFFERENT KINDS OF TREES, AND 60 KINDS OF BIRDS LIVE HER

E.【T4】______ YOU ARE DOWNTOWN IN THE CITY OF NARA, JAPAN, IN KASUGAYAMA FOREST, THE OLDEST URBAN FOREST IN THE WORL

D. CITIES AROUND THE WORLD ARE【T5】______ SOME URBAN FORESTS ARE PARKS, AND SOME ARE JUST STREETS WITH A LOT OF TREES. BUT ALL URBAN FORESTS HAVE MANY GOOD EFFECTS ON THE ENVIRONMENT.【T6】______ THEY ALSO STOP THE NOISE FROM HEAVY TRAFFI

C.

A. OUT OF

B. RURAL

C. TO PROTECT A. WORKING【T1】______ THEIR URBAN FOREST

B. TREES TAKE POLLUTION【T2】______ THE AIR

C. BUT YOU ARE NOT IN【T3】______ AREA YOU ARE STANDING IN A BEAUTIFUL FOREST IN JAPA

N. THE AIR IS CLEAN AND SMELLS LIKE PLANTS AND FLOWERS. THERE ARE 175 DIFFERENT KINDS OF TREES, AND 60 KINDS OF BIRDS LIVE HER

E.【T4】______ YOU ARE DOWNTOWN IN THE CITY OF NARA, JAPAN, IN KASUGAYAMA FOREST, THE OLDEST URBAN FOREST IN THE WORL

D. CITIES AROUND THE WORLD ARE【T5】______ SOME URBAN FORESTS ARE PARKS, AND SOME ARE JUST STREETS WITH A LOT OF TREES. BUT ALL URBAN FORESTS HAVE MANY GOOD EFFECTS ON THE ENVIRONMENT.【T6】______ THEY ALSO STOP THE NOISE FROM HEAVY TRAFFI

C.

(a)写出A点信号的数学表达式； (b)分别写出通过3个滤波器后B点和C点信号vD(t)的表达式并说明它们是什么信号。

A. 1

B. 2

C. 3

D. 4