孟德尔由于发现了遗传学的两大定律，被称为“遗传学之父”，请问他取得成功的主要原因是什

当蓄电池放电容量达不到额定容量的30％时，表明蓄电池的使用寿命终结。

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.

Which of the following may require an extra payment?（）

A. Cooked dinner.

B. Mealtime dessert.

C. Packed lunch.

D. Special diet.

In relation to a company’s memorandum of association, explain the following:

(c) the name clause. (4 marks)

计算题：5g水中溶有16gNaCL，求NaCL的质量分数。

共建“一带一路”是（）的积极探索，将为世界和平发展增添新的正能量。

A、区域合作

B、全球治理新模式

C、国际合作

D、社会治理