△ABC中，∠C=90°，∠B=60°，AC=3，以C为圆心，r为半径作⊙C，如

以下关于电子银行密码的描述错误的是（）。

A、电子银行密码是个人注册客户在办理证书补办、增加账户交易时必须提供。

B、电子银行密码由客户自己设定。

C、部分客户可能没有电子银行密码。

D、电子银行密码由数字和英文字母的任意组合而成。

第二节: 语法填空(共10空,每空1.5分,满分15分)

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填人一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为26-35的相应位置上。

Many strange things were happening in the countryside of northeast Hebei, where the  water in the wells rose and fell,  26  smelly gas came from the cracks, the chickens and the pigs were too nervous to eat and even mice ran out of the fields    27   (look) for places to hide. Fish jumped out of   28   bowls and ponds. But the one million people in the city,  29 thought of little of these events, were sound asleep as usual that night. At 3:42 am, everything began to shake. The world seemed to be   30  an end. In fifteen terrible seconds a large city lay in ruins. Two-thirds of the people died or   31  (injure). All of the city’s hospitals,75% of  32   factories and buildings disappeared. All the railway tracks were now   33   (use) pieces of steel. It was very hard to get water, food and electricity. However, all hope was not lost. Soon after the earthquakes, many soldiers came to help the rescue workers. The army organized teams to dig out those who were trapped and     34   (bury) the dead. Workers built shelters for survivors    35  homes had been destroyed. Little by little, the city began to breathe again.

（5分） A、B、C、D、E、F六种短周期元素，原子序数依次增大，A、E同主族，D、F同主族，A元素的原子半径是所有原子中最小的，B元素原子的最外层电子数是内层电子数的2倍，C元素的最高价氧化物的水化物X与其氢化物反应生成一种盐Y，A、B、C、E、F五种元素都能与D元素形成原子个数比不相同的常见化合物。回答下列问题：

（1）F元素在周期表中的位置     ，    ，在以上元素最高价氧化物的水化物中，碱性最强的化合物的电子式是：          。

（2）D、F的气态氢化物，沸点较高的是           （填分子式）。

（3）A单质与C单质在一定条件下可化合为Z，常温下，向pH=a的Z的水溶液中加入等体积pH=b的X的水溶液，且a+b=14，充分作用后，溶液pH      7（填“>”“<”或“=”），原因是                                                 。

车用香品按形态可分为（）。

A.气雾型

B.液体型

C.固体型

D.挥发型

简述有害生物风险分析的发展。