人工分拣格口一般不超过（）个。A、20 B、25 C、30 发布时间：2019-11-12 17:26 │ 来源：www.tikuol.com 题型：单项选择题 问题： 人工分拣格口一般不超过（）个。A、20B、25C、30
题型：单项选择题 完形填空。 American people have the habit of saying "Thank you" when something kind is done for them or something polite is said to them, no matter how easy the thing is. This habit is learned by people of many __1__ countries. You should say "Thank you" when someone __2__ you the salt on the table, when someone steps aside to let you __3__ in a corridor (走廊), when someone __4__ ahead of you keeps the door open __5__ you, when someone says your work is well __6__ or you have bought a nice thing, or your city is very beautiful. "Thank you"is __7__ not only between strangers or new friends, but also between old friends, parents and children, brothers and sisters, husbands and wives. Parents often tell __8__ children that they should say "Thank you" in answer to a kind word or act when they are only four __9__ five years old. Perhaps that's __10__ almost everyone has got this habit. ( ) 1. A. others ( ) 2. A. puts ( ) 3. A. pass ( ) 4. A. jumps ( ) 5. A. to ( ) 6. A. made ( ) 7. A. tell ( ) 8. A. his ( ) 9. A. but ( ) 10. A. why B. another B. passes B. jump B. walks B. with B. done B. said B. theirs B. and B. because C. other C. carries C. sing C. sits C. for C. built C. to say C. their's C. or C. when D. else D. borrows D. dance D. walking D. on D. doing D. told D. their D. so D. reason 查看答案
题型：单项选择题 间接免疫荧光和ELISA检测用已知抗原检测未知抗体，有关抗体正确的是（）A.第1抗体为羊抗人免疫球蛋白B.第2抗体为人免疫球蛋白C.第1抗体为兔抗人免疫球蛋白D.第1抗体为人免疫球蛋白，第2抗体为羊抗人免疫球蛋白E.第1抗体为人免疫球蛋白，第2抗体为荧光或酶标记的羊／兔抗人免疫球蛋白 查看答案