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【单选题】
题4-2-4、下图电路中，源极跟随器的作用是（）。【图片】A.
信号放大
B.
信号变换
C.
电平转移
D.
输出缓冲
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反馈参考答案：
举一反三
【简答题】四大南药,是指在中国长江以南地区所产的槟榔、益智仁、砂仁、巴戟天四味中药。是中国传统地道药材名称,21世纪初的主要产地在海南。 (选自百度百科) 1上述语段主要使用了 的说明方法 。
【多选题】酱卤制品的种类及其特点（ ）。
A.
糟肉类主要特点是保持原料固有的色泽和曲酒香气
B.
白煮肉类主要特点是最大限度地保持了原料肉固有的色泽和风味，一般在食用时才调味
C.
酱卤肉类主要特点是色泽鲜艳、味美、肉嫩，具有独特的风味
D.
酱卤制品包括酱卤肉类、白煮肉类和糟肉类三类
【单选题】患者,女性,32岁。反复胸闷气急,咳嗽查体心界稍大,心率100次/分,律齐,S1增强,P2亢进,可闻及开瓣音,心尖部可闻及舒张中晚期隆隆样杂音。既往有“游走性关节炎病史。进一步确诊,应首先考虑的检查是
A.
胸部X线片
B.
心电图
C.
超声心动图
D.
心电图运动试验
E.
心导管检查
【单选题】听力原文：M: Whose basketball is this? W: Sorry, I don't know. Q: Do you know. whose basketball is that? (17)
A.
Tom's.
B.
It's mine.
C.
I don't know.
【单选题】W e do n ’ t kn o w ______ i t n e x t . L e t ’ s a s k M r L i f or h e l p .
A.
how t o d o
B.
w h a t t o do
C.
t o do how
D.
t o do w h at
【单选题】听力原文：W: Do you know what Marie's hobbies are? M: I don't know. But she likes nothing better than to talk on the telephone with her friends. What have we learned about Marie? (16)
A.
Maria likes to talk on the phone with her friends.
B.
Maria doesn't like to talk on the phone with her friends.
C.
Maria's friends don't call her very often.
D.
Mafia doesn't have any friends.
【单选题】— Do you know if it ______ tomorrow? — Sorry, I don't know. If it ______, we will go fishing. [ ]
A.
Will rain, won't rain
B.
Will rain, doesn't rain
C.
rains, won't rain
D.
rains, doesn't rain
【单选题】听力原文：M: Whose basketball is this? W: Sorry, I don't know. Q: Do you know whose basketball is that? (23)
A.
Tom's.
B.
It's mine.
C.
I don't know.
【单选题】听力原文：W: Do you know what Maria's hobbies are? M: I don't know, but she likes nothing better than to talk on the telephone with her friends. Q: What have we learned about Maria? (8)
A.
Maria doesn't have any friends.
B.
Maria has many hobbies and interests.
C.
Maria's friends don't call her very often.
D.
Maria likes to talk on the phone with her friends.
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