Believe it or not, when first (introduce) ____ to Europe, tomato was thought to be poisonous.

Project（71）is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

The guard, fencing or shielding for moving parts or machinery can be removed for repair only when the machinery it belongs to（）

When loading or discharging dry mud or cement，crew members should use goggles and（）.

The（）may examine or re-examine the goods or take samples from them straightaway in the absence of the consignee or the consignor whenever it considers this necessary.

Motor transport has the biggest market share in the paragraph. Is it true or not （）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

When the author wrote “KEXP did not release numbers” in Paragraph 4, he or she most probably meant that KEXP did not.

If you do not know the subject, you will not understand what is said or written, even if English is your mother （） what is said or written.

Never（）the lifeboat or lifecraft disengaging locks or hydrostatic release gears because it can cause them to fail to function.

●设AND、OR和NOT分别表示按位与、按位或和按位求反运算，且X=10011011，Y=01111010，Z=11101000，则(NOT(X) AND Y)= (9) ， (Y OR NOT(Z))= (10) 。10011011011110101110100001100000(10)

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。