在幻灯片播放过程中，若单击鼠标左键不能立即显示出下一张内容，表示( )。A．已到了演

In a recent discussion on the quantity theory of money, three junior economists, Fred Sauvage, Linda McIntyre and Jason Richards, were discussing the long-run changes in economic variables that would result from an increase in the money supply. They stated the following: Sauvage: According to the quantity theory of money, in the long run only the price level would change if the central bank increased the money supply. McIntyre: According to the quantity theory of money, an increase in the money supply would bring about a long-run decline in unemployment. Richards: According to the quantity theory of money, in the long run only the velocity of money would change as a result of an increased money supply. Are the statements made by Sauvage, McIntyre and Richards correctSauvage McIntyre Richards()

A. Incorrect Correct Correct

B. Correct Incorrect Incorrect

C. Correct Incorrect Correct

具有扩张血管特别是扩张肾小动脉作用的正性肌力药是（）

A.肾上腺素

B.硝普钠

C.硝酸甘油

D.多巴酚丁胺

E.多巴胺

在“探究弹簧弹力大小与伸长量的关系”实验中，甲、乙两位同学选用不同的橡皮绳代替弹簧，为测量橡皮绳的劲度系数，他们在橡皮绳下端依次逐个挂上钩码（每个钩码的质量均为m=0.1kg，取g=10 m/s²），并记录绳下端的坐标x_加i（下标i表示挂在绳下端钩码个数）。然后逐个拿下钩码，同样记录绳下端的坐标x_减i，绳下端坐标的值的数据如下表：

（1）同一橡皮绳的x_加i____x_减i（填“大于”或“小于”）；

（2）_______ 同学的数据更符合实验要求（填“甲”或“乙”）；

（3）选择一组数据用作图法得出该橡皮绳的劲度系数k（N/m）；

（4）为了更好地测量劲度系数，在选用钩码时需考虑的因素有哪些？

手术前晚需做清洁灌肠的是( )

A．剖腹探查术
B．子宫肌瘤挖除术
C．卵巢囊肿剥除术
D．卵巢癌伴有肠道转移

白术经炒制后可缓和燥性，减少对胃肠的刺激作用，是因为炒后能使（）

A.挥发油含量降低

B.内酯类含量降低

C.有机酸含量降低

D.脂肪油含量降低

E.鞣质含量降低