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【单选题】
存在于不同种属之间的共同抗原称为A.
异种抗原
B.
同种异型抗原
C.
肿瘤抗原
D.
异嗜性抗原
E.
类属抗原
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反馈参考答案：
举一反三
【单选题】下面是关于计算机内存储器的一些叙述: 1 内存储器由 DRAM 芯片或 NAND 闪存芯片组成 2 CPU 可按字节地址随机存取内存储器的内容 3 目前市场上销售的 PC 其内存容量多数已达 2GB 以上 4 台式 PC 内存容量一般可扩充,手机内存容量一般不可扩充 其中正确的是()
A.
①和③
B.
①和②、③
C.
①和④
D.
②、③和④
【简答题】Westgard多规则质控方法包括了哪些基本规则?
【单选题】下面是关于计算机内存储器的一些叙述: 1 内存储器由DRAM芯片或NAND内存芯片组成 2 CPU 可按字节地址随机存储内存储器的内容 3 目前市场上销售的PC其内存容量多数;已达1GB以上 4 台式PC内存储容量一般可以扩充,手机内存容量一般不可扩充 其中正确的是
A.
仅 ① 和 ③
B.
仅 ①、 ② 和 ③
C.
仅 ① 和 ④
D.
仅 ②、 ③ 和 ④
【单选题】What conclusion can we make based on the whole passage?
A.
Heat pumps are not efficient in supplying heat in coldness.
B.
Heat pumps can find applications everywhere.
C.
Heat pumps are of no use at all.
D.
The inner structure of a heat pump is so complex that it has already been out of date.
【单选题】下面是关于PC机内存储器的一些叙述（） ① 内存储器每次只能读写1个字节（8位） ② 内存储器是由半导体存储器芯片组成的 ③ 目前市场上销售的PC机，其内存容量多数已达512MB以上 ④ PC机的内存容量一般是可以扩充的 其中正确的是（）
A.
①和③
B.
②、③和①
C.
①和④
D.
②、③和④
【单选题】Based on this lecture, what can we infer about the future of marine mammals?
A.
Dolphins and whales will adapt to environmental changes.
B.
Marine traffic and underwater testing may cause their extinction.
C.
People will be able to communicate directly with this species.
D.
Marine animals will be used for military and commercial purposes.
【单选题】What can we learn about the Mayan calendar?
A.
It was based on the European calendars.
B.
It was better than European calendars.
C.
It was as accurate as European calendars.
D.
It was copied by European calendars.
【单选题】What can we learn about the home-based workers in the U.S.
A.
They enjoy more independence and more convenience.
B.
They tend to be more experienced and aggressive workers.
C.
Home-based workers have difficulty balancing work and family.
D.
More than half of all home based workers in the U.S. are women.
【单选题】What do we learn about Mayhew’s previous report?
A.
It was based on his colleagues’hypothesis about global warmin9．
B.
It was contrary to what his team found in the recent study．
C.
It was a complete reversal from his 2008 study about marine invertebrates．
D.
It found evidence for the connections between biodiversity and temperature．
【单选题】Based on the laser operation treatment of three patients。what can we infer from the passage?
A.
Laser light treatment is safe and effective．
B.
Laser light treatment is dangerous and ineffective
C.
Laser light treatment still requires much more studies．
D.
Government should encourage doctors to do research of laser light treatment on the human body．
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