系统知识当线路负荷增加时，导线弧垂将会（）A、增大 B、减小 C、不变 D、因条件不

The nurse is planning a genetic counseling with the parents of a child with Down syndrome, which of the following would the nurse include as the primary role of the genetic team when working with a family

A．Preparing the parents psychologically for the birth of a defective child.

B．Prescribing birth control or abortion measures for the parents as needed.

C．Providing parents with information about the risks of birth defects.

D．Reporting the findings of chromosome analysis of the amniotic cells.

读某地区人口自然增长率变化过程示意图，完成下列小题。

小题1:对图中各阶段的叙述正确的是

A．Ⅰ：农业文明阶段

B．Ⅱ：后工业文明阶段

C．Ⅲ：处于高增长阶段

D．Ⅳ：属于低增长阶段小题2:目前，该地区解决人口问题的主要措施有

A．鼓励提前退休

B．鼓励生育

C．鼓励到海外务工

D．接纳海外移民

赵孟云：“石如飞白木如籀，写竹还应八法通。若也有人能会此，（）。”

下面列出的4种存储器中，易失性存储器是

A．RAM

B．ROM

C．FROM

D．CD-ROM

耙斗无裂纹，无掉齿，齿长磨损不超过（）。

A.50%

B.60%

C.70%