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【多选题】
下列哪些网站属于新闻媒体（ ）A.
新浪网
B.
网易新闻
C.
天涯论坛
D.
搜狐网
手机使用
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复制链接
新浪微博
分享QQ
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反馈参考答案：
举一反三
【单选题】I have no doubt ______ he will overcome all his difficulties.
A.
whether
B.
when
C.
that
D.
if
【单选题】______, to solve problems, and to overcome difficulties, all give one a sense of satisfaction.
A.
To face trouble
B.
Facing trouble
C.
To facing trouble
D.
Being faced trouble
【单选题】下列说法中,( )不正确。
A.
机床夹具具有使工件在夹具中定位和夹紧两大作用
B.
夹具相对于机床和刀具的位置正确性，要靠夹具与机床，刀具的对定来保证
C.
工件被夹紧后，就自然实现了定位
D.
定位和夹紧是两回事
【简答题】运用观察法搜集原始资料的优点在于______。
【单选题】Shims of different thicknesses are inserted between the shells to enable adjustment of the____.
A.
bearing clearances
B.
bearing strength
C.
bearing thickness
D.
bridge hardness
【单选题】I have no doubt ________he will overcome all his difficulties.
A.
if
B.
that
C.
as to
D.
whether
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