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【单选题】
打火机的燃料是丁烷（化学式为C 4 H 10 ），它燃烧时，火苗高且明亮．下列叙述中正确的是（ ） ①丁烷由碳、氢两种元素组成 ②丁烷由丁烷分子构成 ③丁烷分子由碳、氢两个元素构成 ④丁烷由4个碳原子和10个氢原子组成 ⑤丁烷分子由碳原子和氢原子构成 ⑥丁烷由碳和氢两种单质组成．A.
①②④⑥
B.
①②⑤
C.
②③④⑥
D.
③④⑤
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【单选题】Task Two - Responses &8226;For questions 18--22, match the extracts with the responses, listed A-H. &8226;For each extract, decide which response the company made to the problem. &8226;Write one lette...
B.
New shares were issued.
C.
A takeover bid was accepted.
D.
Low-cost products were introduced.
E.
A partnership abroad was formed.
F.
One division was sold off.
G.
Some products were rebranded.
H.
A cost reduction programme was introduced.
【简答题】若 6- 的整数部分为 x ,小数部分为 y ,则 (2 x + ) y 的值是 ( ) .
【单选题】What did the Little Albert Experiment tell us about the relation between stimuli and responses?
A.
Responses to stimuli cannot be conditioned
B.
Responses to stimuli can be conditioned
C.
Conditioned responses can be eliminated
D.
Conditioned responses cannot be eliminated
【判断题】The phytochrome responses are often divided into two types: Inductive (or photoreversible) responses and High Irradiance Responses (HIR).
A.
正确
B.
错误
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