It is no use his _________ there, the situation is hopeless now.
A. to go
B. to be going
C. going
D. having gone
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()that there is anotherfootball match on the air this evening.
A. It says
B. It was said
C. It is said
D. What was said
All the people always get humour in the same way.
A. 对
B. 错
What is funny in one culture might not be funny in another culture.
A. 对
B. 错
0.4 mol H2SO4溶解于水,配成500 mL溶液,其浓度表示正确的是
A. c (H2SO4) = 0.8 mol·L-1
B. c[1/2(H2SO4)] = 0.8 mol·L-1
C. c[1/2 (H2SO4) ]= 0.4 mol·L-1
D. 硫酸的浓度为0.8 mol·L-1
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