固体催化剂的组分包括()。
A、活性组分、助催化剂、引发剂;
B、活性组分、助催化剂、溶剂;
C、活性组分、助催化剂、载体;
D、活性组分、助催化剂、稳定剂。
参考答案:C
在下列空白处填入适当的单词完成对话。
A: Can I help you?
B: Yes, please. Do you have any skirts on __1__.
A: Sure (当然), we have many. What about this white one?
B: Oh, I don't like the__2__. Are there any red ones?
A: Yes. Here you are.__3__it is long for you.
B: Yes, it is.
A: Have a look__4__. this blue one. It looks very nice.
B: OK. How much is it?
A: It is fourteen dollars.
B: I'll __5__ it. Thanks.
A: You're welcome.
血检间日疟原虫患者,采血时间宜于在:()。
A.发作后72小时
B.发作期间
C.发作后数小时至10余小时
D.发作后48小时
E.发作后一周