函数y=2sin(x-π3),x∈[π2,π],的值域是( ) A.[1,2] B.

题型:选择题

问题:

函数y=2sin(x-
π
3
)
x∈[
π
2
,π]
,的值域是(  )
A.[1,2]B.[-1,
3
]
C.(1,2)D.[1,
3
]
考点:正弦、余弦函数的图象与性质(定义域、值域、单调性、奇偶性等)
题型:选择题

饭店必须建立危机预警管理系统,以便把危机消灭在萌芽状态,这是因为危机具有______特征。

A.隐蔽性

B.公开性

C.紧迫性

D.双重性

题型:选择题

What does Britain make you think of? Its royal (王室) family or fish and chips? In fact, Britain is 小题1:f      for forming queues as well. From the supermarket to the underground, queues are everywhere.

I used to think people 小题2: s     queue in China. But I was wrong. You can also see queues everywhere. It is a part of 小题3:d     life. People queue most of the time. They queue to buy tickets in the cinema or when waiting at a restaurant. Most Chinese are 小题4:u      to waiting in a queue.

But sometimes you’ll find 小题5:y     in the middle of a rush, for example, getting onto the underground. Even away from the busy underground platform (站台), queues are different. One day I remembered standing in line at the supermarket. I left a small 小题6: s      in front of me. Within seconds, a girl walked by and took her place in front of me.

I was a 小题7: b     surprised at first, and then a bit angry. And later I smiled. I found these 小题8:e      were very interesting. These small differences help me learn about a new 小题9:c     . Sometimes Chinese are less polite because they are less小题10: p     . And there are usually more people in cities. And of course, queue jumpers are always unpopular.

题型:选择题

有助于胰腺癌的鉴别诊断和病情监测的肿瘤标志物是()

A.CA125

B.SCC

C.CEA

D.CA19-9

E.AFP

题型:选择题

在炎热的夏天,用手触摸烈日下的叶片有凉爽的感觉,这是因为植物进行着______作用,降低了叶片表面的温度的缘故.在大棚种植蔬菜、水果时,可以向棚中充加适量的二氧化碳气体,可以增强______作用提高作物产量,而蔬菜、水果的腐烂是由于______作用的结果.

题型:选择题

如果本题中A公司的被抛弃的大米的损失是共同海损,请求分摊的诉讼时效是多久

A.时效期间为两年,自理算结束之日起计算

B.时效期间为一年,自理算结束之日起计算

C.时效期间为一年,自共同海损发生之日起计算

D.时效期间为两年,自共同海损发生之日起计算

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