确定牙槽骨吸收的标准是（）。 A．牙齿松动Ⅱ°以上为有骨吸收 B．牙周袋深度大于4m

按西周宗法制的规定，下列在相关范围内不能成为大宗的是

A．周王室——周王嫡长子、嫡长孙

B．周王室——周王正妻所生之子

C．卿大夫——卿大夫嫡长子嫡长孙

D．诸侯——诸侯嫡长子、嫡长孙

阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。

A

A Language Programme for Teenagers

Welcome to Teenagers Abroad! We invite you to join us on an amazing journey of language learning.

Our Courses

Regardless of your choice of course, you’ll develop your language ability both quickly and effectively.

Our Standard Course guarantees a significant increase in your confidence in a foreign language, with focused teaching in all 4 skill areas----speaking, listening, reading and writing.

Our Intensive Course builds on our Standard Course, with 10 additional lessons per week, guaranteeing the fastest possible language learning (see table below).

Evaluation

Students　are　placed into classes according to their current language skills. The majority of them take on online language test before starting their programme. However, if this is not available, students sit the exam on the first Monday of their course.

Learning materials are provided to students throughout their course, and there will never be more than 15 participants in each class.

Arrivals and Transfer

Our programme offers the full package—students are take good care of from the start through to the very end. They are collected from the airport upon arrival and brought to their accommodation in comfort. We require the student’s full details at least 4 weeks in advance.

Meals/Allergies(过敏)/Special Dietary Requirements

Students are provided with breakfast, dinner and either a cooked or packed lunch(which consists of a sandwich, a drink and a dessert). Snacks outside of mealtimes may be purchased by the student individually.

We ask that you let us know of any allergies or dietary requirements as well as information about any medicines you take. Depending on the type of allergies and/ or dietary requirements, an extra charge may be made for providing special food.

When can a student attend Standard Course?（）

A. 13:00-14:30 Monday.

B. 9:00-12:30 Tuesday

C. 13:00-14:30 Friday.

D. 9:00-12:30 Saturday.

在补体旁路活化途径中的C3转化酶是（）

A．

B．

C．

D．

E．D因子

下列除哪项外均为老芦荟的特点

A．不规则的块状，表面暗红褐色
B．富吸湿性
C．体重而脆
D．有特殊的臭气，味极苦
E．原植物为库拉索芦荟

习 * * * * 强调：“在当前形势下，中美双方要不畏艰难，勇于创新，积累正能量，努力建设相互尊重、互利共赢的合作伙伴关系，开创中美构建新型大国关系新局面。”中美积累正能量，需要双方（）

①建立战略同盟关系，推动世界多极化进程

②尊重和维护两国人民自主选择的社会制度和发展道路

③尊重对方的核心利益，寻求广泛的共同利益

④奉行独立自主的和平外交政策，发挥负责任大国的作用

A.①④

B.②③

C.①③

D.②④