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【简答题】
一. 先学习下表,再做练习.(可数名词复数的不规则变化及特殊情况) 类别 要点 例子 A 改变元音字母 tooth→teeth, goose→geese B 单复数同形 sheep, deer, fish, Chinese C 有复数形式 clothes, trousers, shoes, shorts, goods, glasses D 形式上为复数,但意义却是单数 news, politics, maths E 形式上为单数,意义上却是复数 people, cattle, police F合成词 有中心词,在中心词后加-s sister-in-law女婿→sisters-in-law; passer-by路人 →passers-by 以man, woman结尾的合成词两者都要变成复数 man doctor→men doctors; woman teacher→women teachers Englishman→Englishmen 无中心名词,只需在最后的词后加-s go-between→go-betweens中间人; boy student→boy students; grown-up→grown-ups 成年人 ( )1.Several _____ are talking under the tree.And they are talking about______. A.woman; children B.woman; child C.women; children ( )2. There are three in my family. A. people B. person C. child ( )3. Some ______ came to our school for a visit that day. A. Germans B. Germen C. Germany D. Germanies ( )4. In the picture there are many______ and two_______. A. sheeps; knifes B. sheeps; knife C. sheep; knives D. sheep; knife ( )5. There are four_______and two_______in the group. A. Japanese,Germen B. Japaneses,Germen C. Japanese,German D. Japanese,Germans ( )6. Please give me ______ paper. A. one B. a pieces C. a piece D. a piece of ( )7. This table is made of_______. A. many glass B. some glasses C. glasses D. glass ( )8. —What can I do for you, sir? —I'd like two_________. A.bottle of milk B.bottles of milks C.bottles of milk D.bottle of milks ( )9. We can do the work better with______money and ________ people. A. less, fewer B. fewer, less C. little, little D. few, few ( )10. Three ________ and two ________ are trying to catch the thief.( ) A. man doctors; boy students B. men doctors; boys students C. men doctors; boy students D. man doctor; boys students ( )11. He said that two _________ would give lectures the next day. A. woman scientist B. women scientist C. woman scientists D. women scientists ( )12. Two _____will come to our party tomorrow A. German B. Germans C. Germen D. Germens ( )13. There are five _______in our factory. A. woman driver B. women driver C. woman drivers D. women drivers ( )14. John bought ________ for himself yesterday. A. two pairs of shoes B. two pair of shoe C. two pair of shoes D. two pairs of shoe ( )15. There are many _____ in my brother’s bedroom. A. leafs B. pianoes C. boxes D. babys
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举一反三
【单选题】维持静息时细胞膜内外的Na和K浓度差的是
A.
膜上ATP的作用
B.
膜上的Na+-K+泵作用
C.
Na+、K+易化扩散的结果
D.
Na+-K+交换
E.
膜对Na+、K+单纯扩散
【简答题】功率场效应晶体管的全称是功率___半导体场效应晶体管,简称功率___。
【判断题】食物烧煮过程中只要中心温度达到 65 °C就可保证食物安全、卫生。( )
A.
正确
B.
错误
【判断题】MOSFET又称功率场效应晶体管
A.
正确
B.
错误
【单选题】为防止极板硫化,对于经常不带负载的铅蓄电池,应每 进行一次 电。
A.
周/放
B.
周/充
C.
月/充、放
D.
月/充
【简答题】用于比较两个整数不相等的运算符是【 】
【判断题】功率场效应晶体管简称功率MOSFET。
A.
正确
B.
错误
【单选题】根据功率场效应晶体管的转移特性,当棚极电压U小于开启电压U时,功率场效应晶体管MOSFET处于()状态
A.
放大
B.
击穿
C.
截止
D.
导通
【单选题】功率场效应晶体管英文为
A.
mosfet
B.
diode
C.
igbt
D.
thyristor
【简答题】2019年6月5日,中俄元首决定将两国关系提升为 。