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【单选题】
蔗糖酶使大量蔗糖在很短的时间内水解成葡萄糖和果糖,而对淀粉的水解不起作用,这说明酶具有( )
A.
高效性
B.
温和性
C.
高效性和专一性
D.
专一性
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【单选题】听力原文:M: Joy, (23) I'd like to buy some souvenirs for my friends in America. What would you recommend? W: Well, a lot of things in China could make wonderful souvenirs, like ceramics, chinaware, and an...
A.
Because he wants to buy souvenirs for his friends.
B.
Because he wants to buy chinaware for his friends.
C.
Because he wants to go shopping with his friends.
D.
Because he wants to buy some kites for his friends.
【单选题】小儿,1岁。患重度腹泻出现中度脱水及低钾血症。予静脉补液及补钾治疗。在腹泻小儿补钾原则中不正确的是
A.
见尿补钾
B.
每小时尿液30ml以上
C.
膝反射正常
D.
浓度不超过0.3%
E.
紧急时可以静脉直接推注
【单选题】一条直线的真方位角与磁方位角的关系是【】
A.
相差180°
B.
相差磁偏角
C.
相差子午线收敛角
D.
相差90°
【判断题】卫生手消毒是医务人员用速干手消毒剂揉搓双手,以减少手部常居菌的过程。()
A.
正确
B.
错误
【判断题】卫生手消毒是医务人员用速干手消毒剂揉搓双手,以减少手部暂居菌的过程。()
A.
正确
B.
错误
【多选题】What did the writer buy for souvenirs?(纪念品)
A.
cartoon toys
B.
key rings
C.
food
D.
beautiful clothes
【单选题】已知组合体主视图和俯视图,请选择正确的左视图
A.
a
B.
b
C.
c
D.
d
【单选题】引起氧解离曲线右移的因素是
A.
PCO 2 分压升高
B.
2,3-DPG 降低
C.
pH 升高
D.
温度降低
E.
吸入气 CO 浓度升高
【多选题】设计接入网的拓朴结构要考虑
A.
安装难易
B.
适应性
C.
维护难易
D.
经济性
【单选题】What souvenirs are proper for special friends or close family members?
A.
Statuettes or models
B.
Food or wine
C.
Jewelry
D.
Everyday items
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