Part B
Directions: You will hear four dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will hear each piece ONLY ONCE.
听力原文: Over 2,000 years ago, Rome was the center of a large empire. The Romans needed a way to move their large armies quickly so they could protect their huge country. They needed trade routes. So they joined all the parts of their empire by a network of roads.
Beginning in 300 BC, the Romans built roads in Europe, Asia, and North Africa. By AD 200, they had built 50,000 miles of almost straight highways.
To build their roads, the Romans sometimes had to dig tunnels through mountains. They did mot have explosives to cut through the rock. They heated the rock with fire and then threw cold water over it. When the rock cracked, they dug it out with hand tools.
Roman soldiers and slaves built the roads without powerful machinery. They had only simple tools. Yet the roads were so well built that they were used for hundreds of years.
Why did the Romans build so many roads?
A.They wanted Rome to become the center of the world.
B.They wanted to pave important roads with large, flat stones.
C.They needed to keep their soldiers busy by making them build roads.
D.They needed the roads to move large armies and trade goods.
第1题
下列关于恶性肿瘤的描述不正确的是
A. 恶性肿瘤细胞分化不成熟
B. 恶性肿瘤的发生发展包括癌前期、原位癌和浸润癌三个阶段
C. 恶性肿瘤生长较快,呈膨胀性生长
D. 恶性肿瘤常见的转移途径有4种
E. 高分化肿瘤细胞恶性程度低
第3题
不属于恶性肿瘤的特点的是
A.易复发
B.边界清楚
C.浸润性生长
D.发生转移
E.细胞分化不成熟
第4题
不属于恶性肿瘤的特点的是
A.易复发
B.边界清楚
C.浸润性生长
D.发生转移
E.细胞分化不成熟
第5题
不属于恶性肿瘤的特点的是
A.易复发
B.边界不清
C.膨胀性生长
D.发生转移
E.细胞分化不成熟
第6题
不属于恶性肿瘤的特点的是()。
A.易复发
B.边界不清
C.膨胀性生长
D.发生转移
E.细胞分化不成熟
第7题
下列关于恶性肿瘤的说法,哪一项是不正确的
A.恶性肿瘤分化程度越低,恶性程度越高
B.恶性肿瘤主要为膨胀性生长
C.恶性肿瘤容易转移
D.恶性肿瘤易复发
E.恶性肿瘤无包膜,边界不清楚
第8题
下列描述不是恶性肿瘤特点的是
A、通常分化不成熟,多为异型及幼稚细胞
B、核分裂常见,并可见不典型的核分裂象
C、侵袭性生长,边界不清
D、易发生转移
E、常有包膜
第9题
关于恶性肿瘤描述错误的是()
A、生长速度迅速
B、细胞分化程度低
C、细胞异型程度明显
D、很少发生转移
第10题
有关恶性肿瘤细胞的描述不正确的是
A、恶性肿瘤的形态改变是多方面的
B、恶性肿瘤均有异常过度增殖的能力
C、具有浸润性和转移性
D、诊断肿瘤细胞的主要依据是看细胞质的改变
E、根据癌的细胞学类型可将癌分为鳞状细胞癌、腺癌和未分化癌
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