纪伯伦跟谁学过画画和雕塑（）？A、罗丹B、米开朗琪罗C、梵高D、布德尔

Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided.   小题1: 

Write it out

You can also check a math problem by writing everything out on paper.   小题2:  Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.

 小题3: 

Make sure your answers work by doing the opposite procedure of what your problem calls for, including the answer you got the first time around. In other words, you would use the opposite of this addition problem—subtraction (减法)—to determine whether or not your answer is the correct one.

Plugging in

You may find that a variable isn’t good enough or have a problem where you have to solve for a variable (变量).   小题4:  This is the only real way to assure yourself that the answer you’ve found is correct.

Check for a reasonable answer

  小题5:  For example, if you get an answer in the millions and you know it should be in the thousands, you’ve likely misplaced a point. Go back through the work on your paper to make sure all of your formulas (公式) and calculations are correct. If everything looks okay, do the problem again and compare the result of the second try to what you’ve got on the first try.

A．Do the opposite

B．Correct the answers

C．Therefore you’ll improve your grades, as well as your math skills.

D．Plug the variable in the equation (方程) to check it out.E. If the result of a problem seems to make no sense, it indicates that the answer is incorrect.

F. It also helps you to figure out everything after you have already finished the test.

G. This helps you to know what information you have and what information you need to solve.

对漫画的理解，正确的是[ ]

A．这位学生具有作为主人翁的责任感

B．这位学生不懂得学习既是权利，也是义务

C．学习是我们的权利，我们可以放弃权利

D．这位学生的想法是合理的，也是很正常的

据印度外贸总局(DGFT)的一份通知中显示，禁止从中国进口牛奶及奶制品(包括巧克力及巧克力制品、糖果、糕点、含牛奶成分的食品配料等)的禁令将延期到2012年6月24日。材料中印度的做法违反了世贸组织的

A．最惠国待遇原则

B．非歧视原则

C．市场准入原则

D．公平竞争原则

请按要求填空：

（1）选择你熟悉的物质，用化学式填写在对应的空格中

类别	单质	氧化物	酸	碱	盐	有机物
化学式	______	______	______	______	______	______

（2）符号“NH₄⁺”读作______．

（3）写出用过氧化氢与二氧化锰混合氧气的化学反应方程式：______．

草酸钠的抗凝原理是（）

A.除去球蛋白

B.阻止血小板聚集

C.除去纤维蛋白原

D.与血液钙离子结合

E.加强抗凝血酶Ⅲ的作用