如图a所示，一个由薄透镜L1和L2组成的光学系统置于空气中，透镜L1和L2的直径相等F1是L1的物方焦点，是L2的像方

A、Infantry support

B、Intercepting enemy troops

C、Flanking protection

D、Invasion

A、British made abundance of properties

B、no concerns from the French attacks

C、the establishment of British troops’ bonds

D、mistrust between British and the colonies

Jack spent the whole day repairing the car. The work was ______ easy.

A．nothing but

B．something except

C．anything but

D．all except

ish soldier, says now that the shooting was unlawful and entirely avoidable. The US government already cleared the soldiers of any wrongdoing and the British findings are nonbinding. Cockpit recordings captured the incident that happened 4 years ago in Iraq, one British soldier died and 4 others were wounded.The coroner that conducted the inquest criticized US military for not cooperating with the investigation.

The British coroner criticized US military for killing a British soldier unlawfully in a fire incident with US troops 5 years ago.

A．正确

B．错误

What is the approximate range of MF radio waves during the day time？

A.30 nautical miles

B.600 nautical miles

C.150 nautical miles

D.1200 nautical miles

Running slowly for (some) three miles every day (is proved) a good (form) of (exercise).

A．some

B．proves

C．form

D．exercise

A．rally

B．attack

C．march

D．retreat