用划格法测定涂膜的附着力时,可在涂膜上用锋利器划出纵横互成()mm的方格,观察格子交

题型:单项选择题

问题:

用划格法测定涂膜的附着力时,可在涂膜上用锋利器划出纵横互成()mm的方格,观察格子交线周围涂膜的破损情况。

A.1

B.0.5

C.1.5

D.2

考点:高级涂装工高级涂装工题库
题型:单项选择题

制定药品流通监督管理办法的目的

A.规范药品注册行为

B.加强药品监督管理

C.保证药品及时上市

D.规范药品流通秩序

E.保证药品质量

题型:单项选择题

被子植物开花后,通过传粉和          作用,才能形成果实和种子。

题型:单项选择题

Did you know that a turtle(乌龟)can lay 12 eggs in one minute? A large sea turtle lays

around 150 eggs at a time. She lays all these eggs in just a few minutes.

Large sea turtles live in the warm seas of the world. Except for when they lay their eggs,

they spend their whole lives in the water. When it is time to lay their eggs, the females swim toland. They usually return to the place where they themselves were born. How they find theirway back there is unknown.When they reach shore, the big, heavy turtles crawl slowly up to the high water mark.Using their flippers, they pull themselves along the sand. They must struggle like mountainclimbers. When they finally reach dry sand, they rest before beginning the difficult task oflaying eggs.The turtles lay the eggs in deep holes and cover them with warm sand. The sand protectsthe eggs from harm. Then the females leave them. After a few weeks, if you happened to be walking along the beach, you might see the sand begin to shake. You may see tiny black ballscoming out of the sand. The tiny heads of baby turtles!

小题1:

Which sentence expresses the main idea?

A.Sea turtles have interesting life habits.

B.Sea turtles swim to shore to lay their eggs.

C.Large sea turtles lay their eggs in special ways.

D.Sea turtles enjoy staying in the sand.小题2: Turtles bury their eggs to protect them from ____________.

A.deep water

B.danger

C.heat

D.bad weather小题3:We can conclude from this passage that ___________.

A.many turtles die while swimming to shore

B.female turtles protect their babies

C.once turtles land, they never return to the sea

D.the job of laying eggs takes great strength小题4: The writer compares turtles to climbers ___________.

A.because they lay their eggs in mountain areas

B.to give you a picture of how hard they work

C.to tell you that they like to climb

D.to show that mountain climbers are as slow as turtles

题型:单项选择题

平衡轴向力的平衡盘,多用于单级离心泵。

题型:单项选择题

基层处理的第一道工序为()。

A.打磨

B.清除

C.嵌批

D.调配

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