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【多选题】
下列有关苯分子中的化学键描述正确的是 [ ]A.
每个碳原子的sp 2 杂化轨道中的一个形成大π键
B.
每个碳原子的未参与杂化的2p轨道形成大π键
C.
每个碳原子的三个sp 2 杂化轨道与其他两个碳原子和一个氢原子形成三个σ键
D.
每个碳原子的未参加杂化的2p轨道与其他原子形成σ键
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A.
is being built
B.
has built
C.
was building
D.
will be built
【单选题】下列选项中,对各类课程理解不正确的一项是
A.
选修课程容许学生个人进行有选择地学习
B.
综合课程是指运用两种或两种以上学科的知识而组成的课程
C.
螺旋式课程是指将特定的学科内容在不同学习阶段重复呈现，逐步拓展与加深的课程
D.
显性课程可以是有计划的正式课程，也可以是非计划性的课程
【单选题】–_______ is it from Leshan to Chengdu? –I’m not sure, but it takes about two hours to get there by bus.
A.
How soon
B.
How far
C.
How fast
【单选题】----There is no more than one washing machine of that kind left in the shop. What about going and buying ____? ----No, I prefer to find _____ in other supermarkets.
A.
it; it
B.
one; it
C.
it; one
D.
one; one
【多选题】下面句子哪些是接待游客,推荐旅游路线用语 :
A.
What can I do for you?
B.
Would you like to …?
C.
I want to travel to Hainan.
D.
How about going to…?
【单选题】. Look! There is a whole crowd of people over there. Go and see what_____ and if it is a bargain, buy it.
A.
is selling
B.
is being sold
C.
has been selling
D.
has been sold
【多选题】下面的句子哪些是接待游客,推荐旅游路线用语 :
A.
May I help you?
B.
I’m a travel agent.
C.
My name is…
D.
I like football.
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