If I could help___,I needn’t have taken

若x为血类型，请写出与!x等价的C语言表达式______。

吗啡治疗心源性哮喘的机制是什么？

They       your diamond,but I didn’t think they found it. [ ]

A.searched

B.in search of

C.make a search of

D.went searching for

如图所示为“S”形玩具轨道，该轨道是用内壁光滑的薄壁细圆管弯成，放置在竖直平面内，轨道弯曲部分是由两个半径相等的半圆对接而成，圆半径比细管内径大得多，轨道底端与水平地面相切，轨道不可移动。弹射装置将一个小球（可视为质点）从A点以v₀水平弹射向B点并进入轨道，经过轨道后从最高点D水平抛出，已知小球与地面AB段间的动摩擦因数μ＝0.2，不计其他机械能损失，AB段长L＝1.25 m，问：

（1）若圆的半径R＝0.25m，v₀至少多大才能使小球从D点抛出？

（2）若v₀＝9.22m/s，圆的半径R取何值时，小球从D点抛出后的水平位移最大（抛出后小球不会再碰到轨道）？

Linda is a 19-year-old primipara who delivered a viable male neonate 2 hours ago. She has decided to breast-feed. Her 22-year-old husband supports her decision. She tells the nurse, "My mother breast-fed all of her children, but I’m going to need lots of help with breastfeeding. I’m worried that I won’t be able to do this. " Which of the following should the nurse include when assessing the client()

A. Determine the client’s level of motivation to breast-feed.

B. Perform a complete physical examination to determine her need for help.

C. Assess her body-to-fat ratio and nutritional status before beginning breast-feeding.

D. Ask the client if she has read any literature about breast-feeding.