下列实验目的可以达到的是( ) A.电解熔融氯化镁制取金属镁 B.醋酸钠结晶水合

题型:选择题

问题:

下列实验目的可以达到的是(  )

A.电解熔融氯化镁制取金属镁

B.醋酸钠结晶水合物与碱石灰共热制取甲烷

C.浓硫酸与溴化钠共热制取溴化氢

D.饱和碳酸钠溶液除去二氧化碳中的氯化氢

考点:电冶金物质的除杂设计实验方案及探究实验
题型:选择题

阅读小天地:读一读,选一选。

      Summer holiday is coming. My sister wants to go to Shanghai, because it is very near from my city. My

father wants to go to Sanya. He says, " It is very beautiful and warm." My mother wants to stay at home. She

wants to have a rest (休息). But I am going to Beijing. Because it is not far. At last (最后) our family decides

(决定) to go to Beijing. I am very happy.

1. Where does the family to go at last?

A. Beijing.

B. Sanya.

C. Shanghai.

2. How many people are there in the family?

A. Two.

B. Three.

C. Four.

3. Who wants to stay at home?

A. Sister.

B. Mother.

C. Father.

4. My father wants to go ____________ for the holiday.

A. Shanghai

B. Sanya

C. Beijing

5. Is Beijing very far from my home? 

A. Yes, it is.

B. No, it isn't.

C. We don't know.

题型:选择题

薪酬战略的基本目标包括()。

A.效率目标

B.公平目标

C.平衡目标

D.满意目标

E.合法目标

题型:选择题

有关假设检验,下列说法正确的是

A.检验假设针对总体,而不是样本
B.进行假设检验时,既可只写出H0或 H1,也可同时写出H0和H1
C.H0为对立假设
D.H0的内容反映了检验的单双侧
E.都需先计算出检验统计量后再获得 a值

题型:选择题

简述数字签名的执行方式。

题型:选择题

2005年ASCO通过临床试验结果选出肿瘤靶向治疗重大进展的病种包括()。

A.肺癌

B.乳腺癌

C.大肠癌

D.以上都是

E.以上不完全是

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