It's the first time that vehicles were used as weapons in an attack.
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The attacker was a middle-aged man with psychological problems.
A. 对
B. 错
12 people died in the attack in Germany in the attack.
A. 对
B. 错
The driver pledged allegiance to ISIS.
A. 对
B. 错
球与球相交时，其相贯线是
A. 空间曲线
B. 空间曲线、圆
C. 圆
D. 空间曲线、平面曲线
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