主动脉瓣关闭不全的特征性表现为（） A.病理性Q波 B.心电图ST段普遍弓背向下

某林场计划第一年造林10000亩，以后每年比前一年多造林20%，则第四年造林______．

呕吐出宿食常见于（）

A.胃溃疡活动

B.十二指肠球溃疡活动

C.幽门梗阻

D.幽门溃疡活动

E.慢性胃炎活动期

补全对话。

Shop Assistant: Good morning! 1_____?

Mrs Smith: Good morning, sir! I'd like to buy a hat.

Shop Assistant: Who is it for, please? Is it for you, madam?

Mrs Smith: No, it's for my husband.

Shop Assistant: 2_____?

Mrs Smith: Size?

Shop Assistant: How about this one?

Mrs Smith: It looks nice. 3_____?

Shop Assistant: It's made of real fur.

Mrs Smith: Good. 4_____?

Shop Assistant: Forty-five yuan.

Mrs Smith: It's a bit expensive, but it's really a nice hat. 5_____.

                Here's fifty yuan and you may take the change (零钱).

Shop Assistant: Thanks, madam. Goodbye.

不属于机制凭证的是( )

A．工资模块传来的工资费用分配凭证

B．张三录入的提现凭证

C．固定资产模块生成的计提折旧凭证

D．总账模块期末生成的结转损益凭证

射极输出器（）放大能力。

A.具有电压

B.具有电流

C.具有功率

D.不具有任何