GPS卫星信号的基频是()。A.1575.42MHz B.1227.36MHz C.

题型:单项选择题

问题:

GPS卫星信号的基频是()。

A.1575.42MHz

B.1227.36MHz

C.10.23MHz

D.1.023MHz

考点:测绘科学技术GPS原理及其应用GPS原理及其应用题库
题型:单项选择题

试根据生物圈中的物质循环的图解,(如图所示),回答问题:

(1)图中A、B分别代表的生物种类是A____,B____。

(2)图中a表示____作用,b表示____作用,c表示____作用,d表示____作用。

题型:单项选择题

不要在驾驶室的前后窗范围内悬挂和放置妨碍驾驶人视线的物品。

题型:单项选择题

旅行社应当与其聘用的导游______。()

A.依法订立劳动合同,按规定支付劳动报酬和社保费,并为其投保人身意外保险 

B.依法订立劳动合同,支付劳动报酬,缴纳社会保险费用 

C.依法签订劳动合同,支付不低于当地最低工资标准的报酬,缴纳社会保险费用 

D.依法签订劳动合同,支付劳动报酬,并为其投保人身意外保险

题型:单项选择题

The total( )of this shipment is $20000.

A.value
B.weight
C.quantity
D.package

题型:单项选择题

Parents of a child with cystic fibrosis demonstrate knowledge of the effects of hot weather on their child when they state that hot weather is hazardous because the child has which of the following

A.Poor ability to concentrate urine.

B.Little skin pigment to prevent sunburn.

C.Poorly functioning temperature control center.

D.Abnormally high salt loss through perspiration.

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