电路工作状态有三种:()。A、通路 B、开路 C、短路 D、回路

题型:多项选择题

问题:

电路工作状态有三种:()。

A、通路

B、开路

C、短路

D、回路

考点:机械员继续教育机械员继续教育题库
题型:多项选择题

(共10小题;每小题1分,满分10分)

I feel very happy to receive your letter and here I’d like to give you

some a      on how to learn English. Above all, don’t lose 76. ____________

heart. Many students find it _______ to learn English, especially

77. ____________

_______ write good English compositions. In my opinion, if you

78. ____________

want to _______(改善) your writing, you should learn by heart

79. ____________

as many English expressions and sentence p       as possible.

80. ____________

And at the same time try to use _______ in your compositions. I

81. ____________

think just r      grammar rules is no use. And only by reading and

82. ____________

writing a lot _______ you be able to learn English well in an effective

83. ____________

way. I definitely _______(相信) the most important thing is that you

84. ____________

should _______(继续) writing every day and never give up.

85. ____________

题型:多项选择题

以下各项腹股沟斜疝与直疝的鉴别点中,最有意义是()。

A.发病年龄

B.突出途径

C.疝块形状

D.疝内容物有无进入阴囊

E.还纳疝内容物后,压迫深环疝内容物能否再突出

题型:多项选择题

测定水中铝或铅等金属时,采集样品后加酸酸化至PH小于2,但酸化时不能使用()

A.硫酸

B.硝酸

C.盐酸

题型:多项选择题

每回旋绳子一次,即跳一次,以便让绳子绕过脚继续回旋的跳法称为()

A、一跳一回旋

B、交叉跳

C、开叉跳

D、一跳二回旋

题型:多项选择题

分别在四杯100cm3水中加人5g乙二酸、甘油、季戊四醇、蔗糖形成四种溶液,则这四种溶液的凝固点()。

A.都相同

B.加蔗糖的低

C.加乙二酸的低

D.无法判断

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