Every child gave Grandma Lin a present, 9
A. did he
B. didn't they
C. didn't he
D. did it
Not only (there is) (a wide range of) prices for goods in the city, there is (also) a wide range in the quality of goods (on sale).
A. there is
B. a wide range of
C. also
D. on sale
What is this passage mainly about
A. Call on people to protect sharks.
B. Point out the living environment of sharks.
C. Explain why the sharks are dangerous.
D. An introduction to sharks.
无菌室空气采用的灭菌方法是
A. 火焰灭菌法
B. 干热空气灭菌法
C. 流通蒸汽灭菌法
D. 热压灭菌法
E. 紫外线灭菌法
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