下载APP
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Children live in a world in which science has tremendous importance. During their lifetimes it will affect them more and more. In time, many of them will work at jobs that depend heavily on science—fo...
A.
science is linked with many of the things they meet
B.
science is a very easy subject for them to learn
C.
they encounter the facts and principles of science daily
D.
they are familiar with the process and spirit of science
相关题目：
【单选题】X线管内电子轰击的面积称（）。
A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点
【单选题】X线管内电子轰击靶面的面积称（）.
A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点
【单选题】快原子轰击质谱为
A.
FD-MS
B.
EI-MS
C.
FAB-MS
D.
LSI-MS
E.
ESI-MS
【单选题】Χ线管内电子轰击阳极靶面的面积称
A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点
【单选题】快原子轰击质谱为
A.
FD-MS
B.
EI-MS
C.
FAB-MS
D.
LSI-MS
E.
ESI-MS
【单选题】X线管内电子轰击阳极的面积称为
A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点
【单选题】X线管内电子轰击阳极的面积称为:
A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点
【多选题】电子轰击离子源的缺点有()。
A.
化学键较弱的化合物分子离子检测不到
B.
分子量测定困难
C.
轰击电子速度较快
D.
灵敏度较低
【单选题】Children live in a world in which science has tremendous importance. During their lifetimes it will affect them more and more. In time, many of them will work at jobs that depend heavily on science—fo...
A.
science is linked with many of the things they meet
B.
science is a very easy subject for them to learn
C.
they encounter the facts and principles of science daily
D.
they are familiar with the process and spirit of science
【单选题】X线管内电子轰击的面积称( )
A.
大焦点
B.
小焦点
C.
有效焦点
D.
双焦点
E.
实际焦点
【单选题】X线管内电子轰击阳极的面积称为
A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点
【单选题】X线管内电子轰击阳极的面积称为
A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点