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【单选题】
根据加工要求,工件必须限制的自由度没有达到全部限制的定位,称为 。A.
完全定位
B.
不完全定位
C.
欠定位
D.
过定位
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反馈参考答案：
举一反三
【单选题】The article had been hacked about so much that it was scarcely recognizable.
A.
carelessly changed
B.
severely criticized
C.
greatly reduced
D.
roughly cleaved
【单选题】Jack had ____feeling of excitement when hearing his article had been published in school magazine．
A.
the；a
B.
a；the
C.
／；the D the；／
【简答题】石英晶体的性能非常稳______。在20~200°C的范围内的压电常数的温度变化率只有- 0.0001/°C。石英晶体的缺点是:压电常数较______。多用于标______传感器、高准确度测量或使用温度较______的传感器。
【单选题】根桥发生故障后会重新选举其它交换机为新的根桥。那么原来的根桥恢复正常后又会如何?
A.
网络拓扑保持不变
B.
只有当新根桥发生故障才重新选举
C.
一旦原根桥恢复正常就重新选举
D.
不重新选举，原根桥自动成为根桥
【单选题】Jack had feeling of excitement when hearing his article had been published in school magazine．
A.
the; a
B.
a; the
C.
/; the
D.
the; /
【简答题】根据商不变的性质填一填。 0.12÷0.03=( )÷3 0.28÷0.07= ( ) ÷7
【简答题】根据商不变的性质填一填。 0.01÷0.16=( )÷16 0.314÷( )=31.4÷18
【单选题】Unit 2-13 . The article had been hacked about so much that it was scarcely recognizable.
A.
Carelessly changed
B.
severely criticized
C.
greatly reduced
D.
roughly cleaved
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