劳累性心绞痛发作时,你认为立即给下列哪种药效果好:()
A.心得安
B.洋地黄制剂
C.消心痛
D.潘生丁
E.硝酸甘油
参考答案:E
某种型号的拖拉机每耕地667m2(1亩)消耗0.8kg柴油.该拖拉机油箱容积为150L,可装柴油____g,一箱柴油可供它耕地_________亩.(柴油=0.85×103kg/m3)
I think watching TV every evening is a waste of time. There are _________ meaningful things to do.
A.less
B.more
C.theleast
D.themost