肺脓肿常出现（） A．急性刺激性干咳 B．长期晨间咳嗽 C．带喉音的咳嗽 D．阵发性

肉毒毒素的作用部位是

A．脊髓前脚

B．血管内皮

C．外周神经-肌肉接头处

D．脊髓后脚

E．呕吐中枢

电冰箱、电风扇等家用电器的主要部件都是电动机，电动机是根据电流或通电导体在磁场中会受到______的现象制成的．

你想喝自制的汽水吗？小雨同学为你提供了“七喜”汽水成分表（见下图）．

（1）根据“七喜”汽水的成分表，分析自制汽水所需的原料是：

白砂糖、果汁、食用香料、______和______．

（2）打开汽水瓶盖，有大量气体逸出．请你对该气体的成分进行探究，完成下表：

左少腹作痛，按之累累有硬块者为

A．痞满
B．虫积
C．聚
D．肠痈
E．肠中有宿粪

Modem computers based onare（）millions to billions of times more capable than the early computers, which occupy a fraction of the space. Simple computers are small enough to fit into mobile devices, and mobile computers can be powered by small batteries. Personal computers in their various forms are icons of the Information Age and are what most people think of as ‘computers’.

A.central processing unit

B.integrated circuits

C.hard disk

D.software integration