生产硫铵过程中,母液的温度对产品质量影响较大,一般应控制在()℃。
A、20~25
B、30~35
C、40~45
D、50~60
参考答案:D
单词拼写 (每题1分,共10题, 满分10分)
小题1:The change in climate may __________(影响) your health.
小题2:It is reported that only two people _______(幸存)the accident at last.
小题3:The ship _______(下沉)to the bottom of the sea after hitting an iceberg.
小题4:You've been working all morning---you __________(应得) a rest
小题5:He is good at ______(解决) this kind of problem.
小题6:The textbook c________ 10 units, including a mainly revision.
小题7:Our constitution (宪法)says that all men are e __________.
小题8:I would a________ it if you could help me with my English.
小题9:The teacher decided to d________ all his life to education.
小题10:In my o_________, I don’t agree with your plan.
试样X由氧化亚铁和氧化铜组成,取质量相等的两份试样按下图所示进行实验:
请写出步骤③中所发生的全部反应的离子方程式。