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【单选题】
灭活疫苗的保存条件是【 】A.
室温
B.
0 ℃
C.
4~8 ℃
D.
-20℃ 以下
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】当定义一个结构体变量时,系统为它分配的内存空间是
A.
结构中一个成员所需要的内存容量
B.
结构中第一个成员所需要的内存容量
C.
结构体中内存容量最大者所需要的容量
D.
结构中各成员所需要内存容量之和
【简答题】听对话，回答问题。 1. How many trees are going to be planted today? A. 700. B. 1400. C. 2000. 2. What does the speaker advise volunteers to do? A. To leam some tree-planting skills. B. To come along any time t...
【简答题】听力 1. How did the man feel? A. He was proud. B. He was very nervous. C. He was very excited 2. What does the woman mean? A. The man should do his homework B. The man should go to see a movie. C. The m...
【简答题】听对话，回答问题。 1. Who is the woman talking with? A. A teacher. B. A student. C. A father. 2. What does the man think of Frank? A. He is quiet. B. He is active. C. He is honest. 3. What does the woman think...
【单选题】柴油主机的防爆导门在曲轴箱上的安装位置，正确的是（）。 ①双主机的应安装在船中侧 ②双主机的应安装在船舷侧 ③单主机的应安装在操纵台侧 ④单主机的应安装在非操纵台侧
A.
①③
B.
②③
C.
①④
D.
②④
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