已知一个等腰三角形的底角是50。,这个等腰三角形的顶角是多少度?

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问题:

已知一个等腰三角形的底角是50,这个等腰三角形的顶角是多少度?

考点:三角形的分类三角形的内角和
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四:单词拼写(共10小题;每小题1分,满分 10分)

76. Reagan was e______ as the thirty-second  President of the United States.

77. I want to write about people who have AIDS or who are a______ to drugs.

78. O_______, what you have said is not true.

79. I can't _______(联系) what he does to what he says

80. Newspapers can keep us well i________ about what is happening all over the world.

81. It's not__________(可靠的)to judge a man only by his looks

82. Her sad r__________ 1ooks the nature of her thoughts.

83. They don't have the best service,but I __________ (容忍)it because I love their food.

84. Scientists ______(预言)that the environmental pollution will increase in the next ten years.

85. It isn’t ________(方便的) to talk at the moment; I’m in the middle of the meeting.

题型:解答题

酒尾中的油状物主要是()、()、()。

题型:解答题
小明同学利用圆珠笔杆、钢丝、细绳制成了如图所示的滑轮组用其匀速提升重物,不考虑摩擦、笔杆和绳重,下列说法正确的是(  )

A.拉细绳的力F等于钩码重力G的

B.拉细绳的力F等于钩码重力G的

C.拉细绳的力F等于钩码重力G的

D.拉细绳下降的距离是钩码上升高度的

题型:解答题

十八届三中全会强调,改革开放是党在新的时代条件下带领全国各族人民进行的新的伟大革命,是()最鲜明的特色。

A.新中国

B.新时期

C.当代中国

题型:解答题

因特网的主要组成部分包括通信线路、路由器、主机和______。

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