In Henry's experiment，he connected the wire to______.

A． a galvanometer

B． an iron bar

C． a battery

D． an electromagnet

[单选题]In Henry's experiment，the galvanometer indicated a voltage when______.A． the coil was connected to a batteryB． the coil was disconnected to a batteryC． neither A nor BD． both A and B

[单选题]What is NOT TRUE about Henry's electromagnet?A． His magnet could. hold 2，300 pounds.B． His magnet was more dangerous.C． There were more turns of wire around the iron rod in his magnet.D． His magnet was an improved model.

[单选题]H．enry's job was to examine cars which crossed the frontier to make sure that they were not smuggling anything into the country. Every morning，except at weekends，he (11) see a factory worker coming up the hill towards the frontier， (12) a bicycle wi

[单选题]The writer/'s experiment shows that downshifting _______ .A． enables her to realize her dreamB． helps her mold a new philosophy of lifeC． prompts her to abandon her high social statusD． leads her to accept the doctrine of She magazine

[单选题]He's had his lunch at school, _____ he?A.isn'tB.hadn'tC.hasn'tD.didn't

[单选题]27． —Who’s Frank?—He's Bruce's_______A．sisterB．brotherC．cousinD． friend

[单选题]It's __________ that he was wrong.A.clearly B.clarity C.clear D.clearing

[单选题]It's_____that he was wrong.A.clearlyB.clarityC.clearD.clearling

[单选题]D．r. Yehuda/'/'s research suggests that womenA．Need extra doses of chemicals to handle stress.B．Have limited capacity for tolerating stress.C．Are more capable of avoiding stress.D．Are exposed to more stress.

[问答题]()I'm certain he'll go to see the film,because he's boughta ticket.