医生通过观察、号脉、听诊诊断病情属于下列哪种思维特性( )
A.直接性
B.间接性
C.广阔性
D.创造性
参考答案:B
如图所示的军事观察孔,人可以通过孔观察外面,现在在孔中嵌入玻璃砖后观察的范围将( )
A.变大
B.变小
C.不变
D.无法确定
The volunteers _____ a lot of help to the community for nearly ten years. [ ]
A. offered
B. will offer
C. are offering
D. have offered