单词分类。A. pencil B. cake C. hot dog D. pin

患者，男性，77岁。因"COPD、呼吸衰竭"入院。体重50kg（原体重约60kg），血清白蛋白30g／L，血清转铁蛋白1.50g／L，则患者的营养状况属于（）

A.无营养不良

B.轻度营养不良

C.中度营养不良

D.重度营养不良

E.提供信息不够，无法判断

如图所示，所受重力大小为G的木块和倾角为θ的斜面体间的接触面光滑，对木块施加一水平推力F，木块相对于斜面体静止，斜面体相对于水平地面也静止，则木块对斜面体的压力大小为（　　）

A．

B．Gcosθ

C．

D．Gcosθ+Fsinθ

短文填词。

Hello, everyone!It's my turn to say something

about graduation.Graduation is a time when we move on

from middle school________university.

Before________(毕业) from school, we usually have a

variety of activities, like taking pictures, leaving encouraging

words to one another in m________of our friendship,

or giving presents to our teachers to________(表达)

our thanks and respect.________, I have mixed feelings

about moving on.I want to stay and have more fun with

my________(朋友), but I have to realize my dream.

Graduation m________growing up and taking up more

responsibilities.We must face our future________(勇敢).

Whether we are ready or not, graduation is drawing near.

So I think________important for us to treasure every

minute of our time at school.To make our

dream come________, we must try our best.

化学反应可视为旧键短裂和新键形成的过程。共价键的键能是两种原子间形成1mol共价键（或其可逆过程）时释放（或吸收）的能量。已知H-H 键的键能为436kJ·mol^-1，Cl-Cl键的键能为243 kJ·mol^-1，H-Cl键的键能为431 kJ·mol^-1，则H₂(g ) + Cl₂(g ) == 2HCl(g ) 的反应热(△H )等于[ ]

A．-183 kJ·mol^-1

B．183 kJ·mol^-1

C．-862 kJ·mol^-1

D．862 kJ·mol^-1

已知i、j、k为int型变量，若要从键盘输入2、3、4＜CR＞，使I、j、k的值分别为2、3、4，下列正确的输入语句是( )。

A．scanf("%3d,%3d,%3d",&i,&j,&k)；

B．scanf("%d,%d,%d",&i,&j,&k)；

C．scanf("%d%d%d",&i,&j,&k)；

D．scanf("i=%d,j=%d,k=%d",&i,&j,&k)；