某厂一月份生产某机器100台，计划二、三月份共生产280台．设二、三月份每月的平

氢能是一种应用前景非常诱人的新能源，但且前仍处在研究试验阶段，还未能进入应用阶段，其原因是[ ]

A．氯气燃烧对环境影响的评价问题尚无定论

B．氢气的制备耗能巨大，廉价制氢技术尚未成熟

C．空气中氢气的含量太少

D．氢气燃烧的放热量低于相同质量的矿物燃料，经济效益欠佳

时态填空，阅读下面一篇短文，根据情景，用所给动词的正确时态填空。

Do you know sports lotteries( * * )? Young people can get addicted(上瘾) to it, especially if they 小题1:   ___(win), they 小题2:__      __ (think) playing the lottery is the right way to make money. But it’s not. Tiantian, a student in our city, 小题3:       ___(go) home on time to study after class every day before. But for the past two months, he has been running home to do a new kind of “homework”. He’s busy pickinglucky numbers in sports lotteries. He said he spends 20 yuan buying lottery tickets every week. Of course, he 小题4:__       __ (win) little money. So “I am going to keep on buying tickets every week,” he said. Quite a lot of young students, like Tiantian, are attracted（吸引） by this game. Because all of them believe “Win big money with only two yuan!” In fact, Tianyian didn’t win big money, at the same time he 小题5:        (fail) in his study. Experts say the lottery is bad for students.

关于孕期的劳动保护，下列哪项正确：

A．妊娠满7个月后不要从事夜班劳动

B．临近预产期不要从事夜班劳动

C．妊娠满6个月后不要从事夜班劳动

D．妊娠满5个月后不要从事夜班劳动

E．妊娠期不上夜班

教学进度又叫（）。

A.学段体育教学计划

B.单元体育教学计划

C.学期体育教学计划

D.学时体育教学计划

一般突发事件发生后，由发生地区、县突发事件应急委员会指挥协调应急处置工作，根据实际需要，市专项应急指挥部协助做好相关应急处置工作。