真空条件下,脱氢的化学反应方程式是:2[H]=[H2]。
参考答案:错
Nowadays, many kids have their own opinions and thoughts, so they talk something _____. [ ]
A. different
B. differently
C. quickly
D. quietly
To their great _____, Tom’s problem proved not to be as serious as they had feared.
A.happy
B.worry
C.anxiety
D.relief