听力原文: Of all the stars the sun is the nearest to the earth. Millions of other stars are even bigger and brighter than the sun. They look small only because they are much father away. You can't see them in the daytime. But if you go out at night,you'll be able to see thousands of them.
The earth is one of the sun's planets,and the moon is the nearest to the earth in space,and men have visited it already. No man has traveled farther than the moon,but spaceships without people have reached other planets.
Many countries have sent up man-made satellites to circle the earth. With their help,people have done much research in many fields of science. Our countries sometimes have sent up man-made satellites to send and receive TV programs. This has helped the people of China and other countries to understand each other better.
(33)
A.It is the smallest one of all the stars.
B.It is the nearest one to the earth.
C.It is the biggest one of all the stars.
D.It is the farthest one from the earth.
第1题
氯化钡试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属检查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
第2题
氯化钡试液用于
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属俭查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
第4题
硝酸银试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中重金属检查
D.磺胺嘧啶中重金属检查
E.铁盐检查
第5题
硫化钠试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中重金属检查
D.磺胺嘧啶中重金属检查
E.铁盐检查
第6题
硫氰酸盐试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中重金属检查
D.磺胺嘧啶中重金属检查
E.铁盐检查
第7题
硫化钠试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属检查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
第8题
硫氰酸盐试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属检查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
第9题
硝酸银试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属检查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
第10题
硫代乙酰胺试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中重金属检查
D.磺胺嘧啶中重金属检查
E.铁盐检查
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