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【单选题】
手续繁琐。这样的非关税壁垒属于( )。A.
进出口国家垄断
B.
卫生检疫规定
C.
技术性贸易壁垒
D.
歧视性政府采购
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反馈参考答案：
举一反三
【单选题】He had____ for supper and felt uncomfortable.
A.
too many
B.
much too
C.
too much
D.
many too
【简答题】Complete the sentences with the target words in the box. Change the form where necessary. Be careful, there are two extra words. 1. The little girl felt _____ for lying to her parents. 2. The contest ...
【单选题】He felt much too ______ at being the center of attention
A.
public
B.
advanced
C.
embarrassed
D.
honest
【简答题】When Paul worked in marketing, he shared an office with another colleague. They each felt the other chatted on the phone too much, which really ____________.
【多选题】下列有关维生素B12，正确的是（ ）。
A.
为细胞分裂和维持神经组织髓鞘完整所必需
B.
促进酮型半胱氨酸转变为蛋氨酸，促进甲基丙二酰辅酶A转变为琥珀酰辅酶A
C.
正常人肝内储有大量维生素B12
D.
参与体内甲基转换和叶酸代谢
E.
恶性贫血患者可用维生素B12进行治疗
【单选题】He felt much too ______ at being the center of attention.
A.
embarrassed
B.
public
C.
advanced
D.
honest
【单选题】He felt bad because he had drunk too _______the night before.
A.
many
B.
much
C.
few
D.
little
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