【判断题】滚动轴承的接触密封方式只适用于速度较低的场合。
【单选题】Your firm is bidding on a large construction contract in a foreign country. This contingent exposure could best be hedged?
A.
with put options on the foreign currency.
B.
with call options on the foreign currency.
C.
both a) and b), depending upon the specifics ("the rest of the story").
D.
with futures contracts.
【单选题】An individual writes a March 82 naked T-Bond Call for a premium of 2-16 when March T-Bond futures are trading at 80-00. The current futures margin on a T-Bond futures contract is $3,000.The options ma...
【单选题】下列关于三相异步电动机的叙述中,正确的是( )。
【单选题】Consider the following statements on open interest: I. It represents a contract consisting of a long and a corresponding short position. II. It is simply the total amount of outstanding contracts in t...
B.
Only I, II, and III are correct.
C.
Only II, III, and IV are correct.Your selection is incorrect
【单选题】为了用光盘直接启动进行系统安装,应在‖CMOSSETUP‖中将‖BootSequence‖项设为()
【多选题】下列关于关系代数表达式等价转换规则的叙述中,哪些是正确的?( )。
【多选题】下列关于关系代数表达式等价转换规则的叙述中,哪些是正确的?( )。
【多选题】下列选项中,关于电缆敷设的安全技术,叙述正确的有( )。
A.
敷设电缆时,处于电缆转向拐角的人员,应该站在电缆弯曲半径的内侧
B.
敷设电缆时,电缆过管处的人员必须做到:接迎电缆时,施工人员的眼及身体的位置不可直对管口,防止挫伤
C.
推盘的人员不得站在电缆盘的前方,两侧人员站位不得超过电缆盘轴心,防止压伤事故发生
D.
在交通道路附近或较繁华的地区施工电缆时,电缆沟要设栏杆和标志牌,夜间设标志灯(红色)
E.
在已送电运行的变电室沟内进行电缆敷设时,必须做到电缆所进入的开关柜停电,在任何情况下与带电体操作安全距离不得小于2mm(10kV以下开关柜)
【单选题】What can be traded on the secondary market? ( )