单选题：Many scientists have been probing psychological problems.

题目内容：

Many scientists have been probing psychological problems. A．solving
B．exploring
C．settling
D．handling

参考答案：

答案解析：

The government warned the people of being careful about this

The government warned the people of being careful about this kind of contagious

分类：卫生类题型：单选题

According to Dela, among most diabetics the importance of exercise is __________

分类：卫生类题型：单选题

The United States will introduce __________.A．the nucleus of a cell B．cloned hum

分类：卫生类题型：单选题

Richard Seed claimed to be able to clone __________.A．the nucleus of a cell B．cl

分类：卫生类题型：单选题

根据以下材料，回答题More Than 8 Hours' SleepAlthough the dangers of too little sleep are

分类：卫生类题型：单选题