肾上腺皮质激素用于治疗：
A．前列腺癌
B．乳腺癌
C．二者均是
D．二者均否
参考答案：D
用一副三角板分别画出150°、75°、105°、15°的角．
Computers and mobile phones, though they are indeed making our life______and more ______, have reduced the need for face-to-face communications.
A．easily ; efficient
B．easier; efficient
C．easy ; efficiently
D．easily ; efficiently
