土壤物理束缚水如(),是通过分子引力吸附在颗粒表面的一种水分形态a、毛管水b、薄膜水

题型:单项选择题

问题:

土壤物理束缚水如(),是通过分子引力吸附在颗粒表面的一种水分形态

a、毛管水

b、薄膜水

c、结合水

d、固态水

考点:土壤肥料学土壤的形成、分类及分布土壤的形成、分类及分布题库
题型:单项选择题

The largest animal ever to live on Earth is the blue whale(鲸鱼). It weighs(重) about 80 tons-more than 24 big elephants. It is more than 30 metres long. A new baby whale weighs as much as a big elephant. Cats won't die if they fall off very high places because they can turn themselves up the right way so as to keep their bodies safe. One cat fell off 32 floors onto the street, but it was just hurt a little. A bear can run as fast as a horse.  A new-born panda is smaller than a mouse and weighs about 100 grams.  Elephants are the most careful animals in their love. A male(雄性) elephant may show his lady love for up to three years until the female(雌性) elephant takes his love. They often show their love by touching each other's body. Usually, wolves do not hurt people. For years a Canadian newspaper says that they would give anyone a lot of money if he or she could show that a wolf could hurt a person. But nobody could do that. Wolves do not usually go together though(尽管) they may do this in winter and they only hurt people at an unusual time.

小题1:How much does a new-born blue whale weigh?

A.About 10 tons

B.As much as a baby elephant

C.About 80 tons

D.About 3 tons小题2:A bear can run_______people think they can.

A.faster than

B.slower than

C.as fast as

D.as slowly as小题3:How many kinds of animals are mentioned(提到) in this passage?

A.Five

B.Six

C.Seven

D.Eight

题型:单项选择题

初产妇,29岁,孕2产0,现妊娠35周,既往曾孕24周脊柱裂胎儿而行引产一次。此次妊娠早期经过顺利。妊娠32周时超声检查发现羊水偏多,胎儿大于妊娠周数,未见明显畸形。孕妇体态肥胖,近期有多饮、多食及多尿症状。

为明确诊断应首选下列哪项检查()

A.血脂系列检查

B.夫妇双方的血型检查

C.口服葡萄糖耐量试验

D.血清病毒系列检查

E.抽取羊水行AFP检查

题型:单项选择题

2011年全国31个省(自治区、直辖市)陆续开展了新一轮村委会换届选举工作,涉及全国59万个村委会近6亿有选举权的村民,选举产生了230多万名村委会干部。每个村都有一位村长(即村委会主任),下列表述正确的是

①村长是我国基层 * * 组成人员

②村长是村民自治的带头人

③村长是村民直接选举的当家人

④村长是村民公共事务的决定者

A.①②

B.③④

C.②③

D.①④

题型:单项选择题

对比色构成画面可以通过面积上的悬殊差异,也可以采用明度和饱和度的变化,或()来取得画面和谐

题型:单项选择题

固定在水平地面上光滑斜面倾角为θ,斜面底端固定一个与斜面垂直的挡板,一木板A被放在斜面上,其下端离地面高为H,上端放着一个小物块B,如图所示。木板和物块的质量均为m,相互间最大静摩擦力等于滑动摩擦力kmgsinθ(k>1),把它们由静止释放,木板与挡板发生碰撞时,时间极短,无动能损失,而物块不会与挡板发生碰撞,求:

(1)木板第一次与挡板碰撞弹回沿斜面上升过程中,物块B的加速度;

(2)从释放木板到木板与挡板第二次碰撞的瞬间,木板A运动的路程s;

(3)从释放木板到木板和物块都静止,木板和物块系统损失的机械能。

更多题库