电子束焊接应包括:电子枪真空室及助焊剂、焊锡料槽。
参考答案:错
填入动词的适当形式。
1. Knives are used for _________ (cut) things.
2. Can you finish __________ (read) the book in three days?
3. The doctor was busy __________ (operate) on the boy at that time.
4. Stop _________ (talk) and listen to me carefully.
5. Thank you very much for _________ (help) us.
6. Granny is very ill and she doesn't feel like _________ (eat) anything.
7. The girl enjoys _________ (listen) to light music.
8. Do you remember _________ (buy) me a beautiful skirt on my 13th birthday?
9. We couldn't help _________ (laugh) after we heard the funny story.
10. What about __________ (go) out for a walk?
下列各句中,没有语病的一句是
A.荣膺过两弹一星功勋奖章殊荣的著名科学家钱学森1950年经过几番波折回国后,在中国的火箭和导弹技术、航空航天作出了跨越式的贡献。
B.2009年10月25日,中国“飞人”刘翔伤愈复出后在第十一届全运会男子110米栏决赛中夺冠,获得全运会历史上首个该项目三连冠的运动员。
C.第十一届全国人民代表大会常务委员会第十一次会议2009年10月31日经表决决定,免去周济的教育部部长职务,任命袁贵仁为教育部部长。
D.苏美德三巨头——前苏联领导人戈尔巴乔夫、美国前总统老布什和德国前 * * 科尔再次于10月31日相聚柏林,一同缅怀柏林墙倒塌20周年。