()is used for lifting cargo.
A mooring winch
B. A windlass
C. A deck crane
D. A lifeboat
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下列关于MAI内容说法错误的是()。
A. 赋予了投资者对东道国政府广泛的直接诉权
B. 投资者的起诉对象限于中央政府
C. MAI的制定者单方面追求发达国家投资者的利益
D. MAI设定的投资待遇标准之高是前所未有的
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) Which three statements inserts a row into the table? ()
A. INSERT INTO employees VALUES (NULL, 'JOHN','Smith');
B. INSERT INTO employees( first_name, last_name) VALUES ('JOHN','Smith');
C. INSERT INTO employees VALUES ('1000','JOHN','NULL');
D. INSERT INTO employees(first_name,last_name, employee_id) VALUES ('1000, 'john','Smith');
E. INSERT INTO employees (employee_id) VALUES (1000);
F. INSERT INTO employees (employee_id, first_name, last_name) VALUES ( 1000, 'john',")
圆锥体大小直径之差的()与长度之比叫斜度,
A. 一半;
B. 1/3;
C. 1/2;