题目内容

If a davit-launched liferaft aboard a ship cannot be launched because of damage to the davit，you should（）.

A. inflate the liferaft on deck
B. roll the liferaft over the side
C. go to another liferaft station
D. get a saw and cut the liferaft free

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进出口货物配额是指国家对某种货物的进口或出口规定一定的数量限额，超过限额后，该货物不得再出口或者进口。关税配额属进出口货物配额的一种。（）

A. 正确
B. 错误

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The CUSTOMERS table has these columns: CUSTOMER_ID NUMBER(4) NOT NULL CUSTOMER_NAME VARCHAR2(100) NOT NULL STREET_ADDRESS VARCHAR2(150) CITY_ADDRESS VARCHAR2(50) STATE_ADDRESS VARCHAR2(50) PROVINCE_ADDRESS VARCHAR2(50) COUNTRY_ADDRESS VARCHAR2(50) POSTAL_CODE VARCHAR2(12) CUSTOMER_PHONE VARCHAR2(20) Which statement finds the rows in the CUSTOMERS table that do not have a postal code? （）

A. SELECT customer_id, customer_name FROM customers WHERE postal_code CONTAINS NULL;
B. SELECT customer_id, customer_name FROM customers WHER postal_code = ' ___________';
C. SELECT customer_id, customer_name FROM customers WHERE postal _ code IS NULL;
D. SELECT customer_id, customer_name FROM customers WHERE postal code IS NVL;
E. SELECT customer_id, customer_name FROM customers WHERE postal_code = NULL

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毛泽东指出：战略上（）敌人，战术上重视敌人。

A. 藐视
B. 重视
C. 防备
D. 注重

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（）是指通过公用电网供给客户端的交流电能的品质。

A. 电压质量
B. 电能质量
C. 频率质量

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If a davit-launched liferaft aboard a ship cannot be launched because of damage to the davit，you should（）.

A. inflate the liferaft on deck B. roll the liferaft over the side C. go to another liferaft station D. get a saw and cut the liferaft free

进出口货物配额是指国家对某种货物的进口或出口规定一定的数量限额，超过限额后，该货物不得再出口或者进口。关税配额属进出口货物配额的一种。（）

毛泽东指出：战略上（）敌人，战术上重视敌人。

（）是指通过公用电网供给客户端的交流电能的品质。

A. inflate the liferaft on deck
B. roll the liferaft over the side
C. go to another liferaft station
D. get a saw and cut the liferaft free