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【单选题】
以下结构中不属于常见的海洋天然产物结构类型的是:
A.
大环内脂类
B.
环烯醚萜类
C.
聚醚类
D.
肽类
E.
萜类
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【判断题】要实现电动机的多地点控制,应把所有的启动按钮 串联 连接,所有的停机按钮 并 联 连接。
A.
正确
B.
错误
【多选题】关于受精卵发育与植入,叨5些是错误的
A.
精子到达输卵管与卵子相遇,称为精子获能
B.
获能的精子穿透初级卵母细胞的透明带,为受精的开始
C.
受精卵产生的“早孕因子”能刺激母体淋巴细胞活性,防止囊胚被排异
D.
妊娠期的子宫内膜称为蜕膜
E.
囊胚与子宫肌层之间的蜕膜为底蜕膜
【单选题】下面关于小型计算机标准接口SCSI的叙述中,错误的是( )。
A.
SCSI总线上的设备分为启动设备与目标设备两大类,启动设备是发命令的设备,目标设备是接收并执行命令的设备
B.
SCSI总线通过SCSI适配器与主机相连,同时也将多台设备(外设或主机)与SCSI接口连接起来,被连接的所有设备都含有按SCSI协议而设计的标准控制器
C.
系统采用SCSI接口时,连接在SCSI总线上的外设相互通信时,必须在系统主机的具体介入下才能完成数据传输
D.
SCSI总线以并行方式传送数据
【单选题】Section B Dialogue Comprehension Directions: In this section, you will read 5 short conversations between a man and a woman. At the end of each conversation there is a question followed by four choice...
A.
It's uncomfortable because of the wind.
B.
It isn't as hot as the man thought.
C.
The man expected it to be windy.
D.
The wind hasn't made it any cooler.
【简答题】要实现电动机的多地点控制,应把所有的启动按钮 并联 连接,所有的停机按钮 连接。
【简答题】在C语言中,标准输出设备和标准错误输出设备是指显示器,它们对应的指针名分别为 __________和__________。
【单选题】Section B Dialogue Comprehension Directions: In this section, you will read 5 short conversations between a man and a woman. At the end of each conversation there is a question followed by four choice...
A.
She is surprised.
B.
She thinks he's not serious.
C.
She feels sorry for the marl.
D.
She is amused.
【简答题】要实现电动机的多地点控制,应把所有的启动按钮( )连接,所有的停机按钮( )连接。
【单选题】Section B Dialogue Comprehension Directions: In this section, you will read 5 short conversations between a man and a woman. At the end of each conversation there is a question followed by four choice...
A.
The exam was easier than the previous one.
B.
Joe is sure that he will do better in the next exam.
C.
Joe probably failed in the exam.
D.
The oral part of the exam was easier than the written part.
【单选题】Section B Dialogue Comprehension Directions: In this section, you will read 5 short conversations between a man and a woman. At the end of each conversation there is a question followed by four choice...
A.
David has good eyesight.
B.
She agrees with the man.
C.
The man should praise David more.
D.
The man has said too much about David.
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