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问题 单项选择题

乳腺癌的乳腺X线摄影最为常见的表现是()

A．乳腺内肿块，密度较高，边缘有毛刺

B．乳腺内肿块，密度较高，边缘可见规则晕环

C．乳腺内肿块，密度较高，边缘光滑的是

D．乳腺内肿块，密度较低，边缘光滑

E．乳腺内肿块，密度较低，边缘不光滑

答案

参考答案：A

单项选择题

A Bluetooth device can be either a master or a slave and any of the devices within a (1) can be the master. There is only one master and there can be up to (2) active slave devices at a time within a single network. In addition, a device may be a standby slave or a parked slave. There can be up to (3) parked slaves. If there are already maximum number of active slaves, then a parked slave must wait until one of the active slaves switches to (4) mode before it can become active. Within a network, all (5) communications are prohibited.

4（）

A．master

B．standby slave

C．parked slave

D．active slave
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单项选择题

珍珠炮制常用的辅料是

A．蛤粉

B．白矾

C．豆腐

D．黑豆

E．生姜
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