The basic American handshake______.

A．can be done with either the right hand or the left hand

B．is complicated and difficult to follow

C．is often done by people at an old age

D．can be done between old or new friends

我国首座获评“媒体艺术之都”，加入联合国教科文组织“创意城市网络”的城市是长沙。

此题为判断题(对，错)。请帮忙给出正确答案和分析，谢谢！

When shopping online, make sure______.

A．you have installed the secured browser in the computer

B．you can see the secure lock displayed by your browser

C．you are alone when making the online purchase

D．you have entered the correct credit card number

下列说法错误的是()。

A.当烤烟烟叶成熟度达到成熟时,烟叶内的糖、氮、碱含量适中,且相互间比例谐调

B.当烤烟烟叶成熟度达到尚熟时,烟叶内的糖、氮、碱含量适中,且相互间比例谐调

C.当烤烟烟叶糖、氮、碱含量最高时,且相互间比例谐调

D.当烤烟烟叶生长发育充分,烟叶内的糖、氮、碱含量适中,且相互间比例谐调

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！

We can infer from the end of the passage that______.

A．a poet is usually insightful of and enthusiastic about life

B．Seamus Heaney felt offended by the Stirling student"s question

C．hoeing is a job requiring more physical labor than digging

D．at an old age, Seamus Heaney hoped to contribute more to poetry creation

During the medieval times, if one man covered in armor extended an open hand to another, ______.

A．the same gesture would definitely be returned

B．he was sending a signal of friendship

C．he would receive a dagger or sword

D．he was asking for a weapon