显微镜和望远镜都装有一组物镜,这两组物镜的作用都相当于( ) A.一个放大镜

题型:选择题

问题:

显微镜和望远镜都装有一组物镜,这两组物镜的作用都相当于(   )

A.一个放大镜

B.投影仪镜头

C.照相机镜片

D.以上说法都不对

考点:显微镜望远镜
题型:选择题
关于x,y的方程组
x+2y=a
2x-3y=b
的解是(  )
A.
x=
3a+2b
7
y=
2a-b
7
B.
x=
3a+2b
5
y=
a-b
5
C.
x=
2a-b
7
y=
3a+2b
7
D.
x=
a-b
5
y=
3a+2b
5
题型:选择题

会计机构负责人移交时,应将全部财务会计工作情况、重大财务收支问题和会计人员的情况,向接替人员介绍清楚。()

题型:选择题

供应商的议价能力主要取决于哪些因素?

题型:选择题

主治外感热病气分高热证

A.清热泻火药

B.清热燥湿药

C.清热凉血药

D.清热解毒药

题型:选择题

Water is (41) important of all the things we (42) and drink. Not many people understand this, (43) it’s quite true. The human body (人体) can go (44) food for a long time, but two (45) three days without water can usually (46) people die.
Many people don’ t understand how much water the human body needs to work well and many people do not drink (47) , even (48) hot weather.
Our body is (49) water, about 65% to 75%, ff we do not have enough water, we’ll (50) tired and many will get ill. So you see, how important water is to us all.

[A] fall [B] fell[C] feel

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