慢性根尖周炎反复发作后引起的牙周病变所具有的特点正确的是（）。 A．有深牙周袋 B．

My leg ____________.[ ]

A. hurts

B. hurt

C. hurting

（1）由阿基米德原理（F_浮=G_排液）结合相关知识，可以推得F_浮=ρ_液V_排液g，从而看出物体受到的浮力大小与物体               和液体的               有关。

      有些爱思考的同学进一步提出，除上述两个因素外，浮力的大小是否还与别的什么因素有关？其中，一个比较具体的问题是：物体所受浮力大小是否与物体的形状有关？针对这个问题，若提供下列器材由你选择，你将选择哪些器材、怎样进行探究？

      供选择的器材有：弹簧测力计，三个形状不同的小石块，橡皮泥，烧杯、细线和水。

（2）你选择的器材是：                                                           。

（3）你的探究方案（即实验步骤）是：_____________________________________________________。

（4）你如何根据探究过程中观察到的现象或获得的数据得出结论：                                                   。

我国80%的法律、所有的行政法规和90%的地方性法规都是由政府来执行的。由此可见[ ]

①政府是我国的行政机关　　②政府自身必须守法　　③政府必须依法行政　　④政府职能必须强化　　

A．①②③　　

B．①②④　　

C．①③④　　

D．②③④

In America , driver’s education is part of the regular high school curriculum. Every student in his or her second year of high school is required to take a class in driver’s education. However, unlike other courses, it is not given during the regular school year. Instead it is a summer course.

The course is divided up into two parts: class time for learning laws and regulations and driving time to practice driving. Class time is not unlike any other class. The students have a text from which they study the basic laws they must know to pass the written driving test that is given to anyone wanting to get a driver’s license.

Driving time is a chance for the students to get behind the wheel(steering wheel) and practice starting steering, backing up, parking, switching lanes, turning corners, and all the other maneuvers （操作） required to drive a car. Each student is required to drive a total of six hours. The students are divided up into groups of four. The students and the instructor go out driving for two hour blocks of time. Thus, each student gets half an hour driving time per outing. The instructor and “driver” sit in the front seats and the other three students sit in the back.

Drivers ED cars are unlike other cars in which they have two sets of brakes, one on the driver’s side and one on the other side where the instructor sits. Thus , if the student driver should run into difficulties the instructor can take over. The car also has another special feature. On the top of the car is a sign that reads: STUDENT DRIVER. That lets nearby drivers know that they should use extra caution because the student driver is a beginning driver, not very experienced and prone to driving slowly.

After the student has passed the driver’s education course and reached the appropriate age to drive(this age differs in every state but in most cases the person must be 16 years old),they can go to a designated state office to take their driver’s test, which is made up of an eye examination, a written test, and a road test. The person must pass all three tests in order to be given a driver’s license. If the person did well in his or her driver’s education class, he or she will pass the test with flying colors and get a driver’s license.

小题1:Which of the following is the best title for this passage?_______.

A．Driving classes

B．Driving Learning

C．Driving Course

D．Driving Experience小题2:In America, the driver’s course mentioned above_____.

A．is considered as part of the advanced education.

B．is given to any student wanting to get a driver’s license.

C．is carried on at the same time as other courses

D．is offered to all the students of Grade 2 in high schools小题3:To prevent accidents, a drivers Ed car_____.

A．has a sign inside it

B．has two sets of brakes

C．is big enough to hold five persons

D．can’t run very fast.小题4:In the last sentence, with “ flying colors” means_____

A．happily

B．successfully

C．colorfully

D．quickly