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【单选题】
在同一试管中，滴加10滴0.1 mol·L-1 K2CrO4、 5滴0.1 mol·L-1 NaCl 、 1滴0.1 mol·L-1 Na2S并混合均匀，再逐滴加入 0.1 mol·L-1的AgNO3。现象是。A.
试管中先析出黑色沉淀，接着析出砖红色沉淀，最后析出白色
B.
试管中先析出黑色沉淀，接着析出白色沉淀，最后析出砖红色
C.
试管中先析出砖红色沉淀，接着析出白色沉淀，最后析出黑色沉淀
D.
试管中先析出白色沉淀，接着析出黑色沉淀，最后析出砖红色沉淀
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【单选题】－Can I use your bike this afternoon?_______ is under repair. －No problem. Here’s the key.
A.
My
B.
Mine
C.
Me
D.
Me
【简答题】宁静的; 平静的 a.
【单选题】中毒型细菌性痢疾多见于
A.
低出生体重儿
B.
3～6个月体格健壮的婴幼儿
C.
2～7岁体格健壮的小儿
D.
8～10岁营养状况较差的儿童
E.
12～14岁青春期儿童
【单选题】The diagram shows a pea pod, which is a fruit Use the key to identify the fruit. 1. sepals fall off as soon as the flower is fertilised ............................ go to 2 sepals do not fall off as s...
A.
2. pod contains fewer than four seeds .............................................. A
B.
2. pod contains more than four seeds ............................................... B
C.
3. fruit splits to release several seeds ............................................... C
D.
3. fruit splits to release only one seed ............................................... D
【单选题】My money is ____, so I have to call my parents saying that I am missing them.
A.
run out
B.
using up
C.
running out
D.
running out of
【单选题】I made a call to my parents yesterday, but _______ of them answered it.
A.
either
B.
none
C.
neither
D.
nobody
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