游标卡尺能精确到小数点后第（）。 A.一位 B.二位 C.三位 D.四位

用于确定混凝土强度等级的立方体试块，其抗压强度保证率为：（）。

A.100% 

B.95% 

C.90% 

D.85%

下列叙述正确的是[ ]

A．固体氯化钠不导电，所以氯化钠不是电解质

B．铜丝能导电，所以铜是电解质

C．氯化氢水溶液能导电，所以氯化氢是电解质

D．SO₃溶于水能导电，所以SO₃是电解质

根据要求完成句子。

1. We publish our school newspaper twice a month. (改为被动语态)

     Our school newspaper ______ ______ twice a month.

2. The meeting began half an hour ago. (同义句)

    The meeting has ______ ______ for half an hour.

3. I heard that she was singing at that time. (改为简单句)

    I heard ______ ______ at that time.

4. My brother gave my mother a present on her birthday. (改为被动语态)

    A present ______ ______ to my mother on her birthday.

5. My friend seems to be very angry. (同义句) 

   ______ seems that my friend ______ very angry.

耳源性颞叶脓肿出现口语运用不能，称（），不能正确说出日常用品的名称，叫（）。

我国大多数中心城市都已经开通了数字有线电视服务，且开始播出高清电视节目。所谓高清晰度电视（HDTV）其画面分辨率是（）。

A．640×480

B．1024×768

C．1920×1152

D．720×576