下列哪项不属于放松措施
A．练习胸式呼吸
B．听音乐
C．做深呼吸运动
D．按摩
E．泡热水浴
参考答案：A
已知同温同压下，气体的相对分子质量越小密度越小。下列气体中密度最小的是
A．N2
B．CO
C．SO2
D．CH4
—How do you like your college life?
—rrible．Not only ____less spare time, but ____myself even busier than before．
A．do I enjoy; do I find
B．I enjoy; I find
C．do I enjoy; I find
D．I enjoy; do I find
